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Optimizing Fertilizer Use and Practical Rainfall Capture in a Semi-Arid Environment with Variable Rainfall

Published online by Cambridge University Press:  03 October 2008

M. I. Piha
M. I. Piha
Affiliation:
Department of Soil Science, University of Zimbabwe, Harare, Zimbabwe
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Summary

Fertilizer use in the semi-arid tropics is considered risky because of the unreliable rainfall pattern. A flexible system of fertilization was devised which allowed for high yields in wet years, and reduced financial losses in dry years. Relatively immobile nutrients, such as phosphorus, potassium and sulphur, were applied at rates determined from generalized soil properties and the total nutrient uptake required for a crop to achieve its maximum yield potential in a season with average rainfall. Nitrogen was applied as a series of split applications, which were adjusted during the season according to the degree of water stress observed. This approach was tested in on-farm trials for maize production on nutrient-poor sandy soils in three regions of Zimbabwe, and resulted in larger yields and profits than current recommendations, providing an accept able level of financial return. Small further yield increases were possible, at acceptable returns, when these fertilizer practices were combined with the establishment of tied-ridges by ox-drawn implements, 30 days after planting. By careful estimation of yield potential, and appropriate adjustments to soil fertility, this system of soil management could be applied to other cropping situations and other areas with variable rainfall.

Uso de fertilizantes para condiciones de precitación variable

Type
Research Article
Information
Experimental Agriculture , Volume 29 , Issue 4 , October 1993 , pp. 405 - 415
Copyright
Copyright © Cambridge University Press 1993

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References

Aina, P. O., Lal, R. & Roose, E. J. (1991). Tillage methods and soil and water conservation in West Africa. Soil and Tillage Research 20:165–186.CrossRefGoogle Scholar
Anderson, J. R. (1988). Possibilities for modifying crop and soil management practices to maximize production per unit rainfall: An interpretive summary. In Drought Research Priorities for the Dryland Tropics, 151–156 (Eds Bidinger, F. R. and Johansen, C.). ICRISAT.Google Scholar
CIMMYT (1980). From Agronomic Data to Farmer Recommendations: An Economics Training Manual. (Completely revised edition). Mexico, D.F.: CIMMYT.Google Scholar
El-Swaify, S. A., Pathak, P., Rego, T. J. & Singh, S. (1985). Soil management for optimized productivity under rainfed conditions in the semiarid tropics. In Advances in Soil Science 1:1–64.Google Scholar
Hulugalle, N. R. (1990). Alleviation of soil constraints to crop growth in the upland Alfisols and associated soil groups of the West African Sudan savannah by tied ridges. Soil and Tillage Research 18:231–247.CrossRefGoogle Scholar
FSU/SAFGRAD (1984). Semi-arid food grain and development programme. Farming systems research in Burkina Faso. Annual Report.Google Scholar
Jones, O. R. & Stewart, B. A. (1990). Basin tillage. Soil and Tillage Research 18:249–265.CrossRefGoogle Scholar
Kroncburg, J. (1988). Farming systems experiences from South Mali. Information Centre for Low External Input and Sustainable Agriculture Newsletter 4:3–4.Google Scholar
Lal, R. (1986). Soil surface management in the tropics for intensive land use and high and sustained production. In Advances in Soil Science 5:1–97.Google Scholar
Low, A. & Waddington, S. R. (1991). Farming systems adaptive research: achievements and prospects in Southern Africa. Experimental Agriculture 27:115–125.CrossRefGoogle Scholar
Mackenzie, S. (1987). Practical application of economics of small scale dryland crop farming in the communal lands in the semiarid areas of Zimbabwe. In Proceedings of a Workshop on Cropping in the Semiarid Areas of Zimbabwe, 360–383. Agritex/R&SS.Google Scholar
Matlon, P. J. (1987). The West African semiarid tropics. In Accelerating Food Production in Sub-Saharan Africa, 59–77 (Eds Mellorm, J. W., Delgado, C. L. and Blackie, M. J.). John Hopkins University Press: IFPRI.Google Scholar
Mellor, J. W., Delgado, C. L. & Blackie, M. J. (1987). Priorities for accelerating food production growth in Sub-Saharan Africa. In Accelerating Food Production in Sub-Saharan Africa, 353–376 (Eds Mellor, J. W., Delgado, C. L. and Blackie, M. J.). Johns Hopkins University Press: IFPRI.Google Scholar
OTA (1988). Enhancing Agriculture in Africa: A Role for U.S. Development Assistance. Office of Technology Assessment, U.S. Congress.Google Scholar
Stewart, J. I. (1990). Principles and performance of response farming. In Proceedings of the International Symposium on Climate Risk in Crop Production: Models and Management for the Semiarid Tropics and Subtropics, 361–382 (Eds Muchow, R. C. and Bellamy, J. A.). CAB International.Google Scholar
Stewart, J. I. & Hash, L. T. (1982). Impact of weather analysis on agricultural production and planning decisions for the semiarid areas of Kenya. Journal of Applied Meteorology 21:477–494.2.0.CO;2>CrossRefGoogle Scholar
Unger, P. W., Stewart, B. A., Parr, J. F. & Singh, R. P. (1991). Crop residue management and tillage methods for conserving soil and water in semiarid regions. Soil and Tillage Research 20:219–240.CrossRefGoogle Scholar
Whingwiri, E., Natarajan, , Makone, .J, Mataruka, D., Low, A., Cameron, T. & Kunjeku, P. (1987). The package for higher maize yields in semiarid zones: Is it economical? In Proceedings of a Workshop on Cropping in the Semiarid Areas of Zimbabwe, 384–396. Agritex/R&SS.Google Scholar